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9-9. TEST POINT DIAGRAM
Outdoor multi controller board
PUMY-P36NHMU(-BS) PUMY-P36NHMUR1(-BS)
PUMY-P48NHMU(-BS) PUMY-P48NHMU
1(-BS) PUMY-P48NHMU2(-BS)
PUMY-P48NHMUR3(-BS)
SW2
pump down
21S4
Four-way valve
SV1
Bypass valve
CNAC
Power supply for multi
controller board
CNS1
Indoor/ outdoor unit
connecting wire
CNS2
Transmission wire of
centrallized control
CN40,CN41
Centralized control power
supply/ For storing
jumper connector selection
CN102
Connect to the M-P.B
(Transmission power board)
CN51
External signal
output
SW4
Model select
SW7
Forced defrost
SW3
Test run
CN2
Connect to the outdoor
power circuit board
1-5:
Power circuit board →
Transmitting signal to
the multi controller board
(0-5V DC)
2-5: Zero cross signal
(0-5V DC)
3-4: 18VDC
(ACTM power supply)
6-5: 16V DC
(Inverter drive power supply)
7-5: 16V DC
(Inverter drive power supply)
CNDC
DC290V–350V
(1(+)–3(-))
VCC (TEST POINT2)
(Voltage between pins of
C82A) : DC15V
(Same as CNF1,2 5(+)–4(-))
VSP (TEST POINT3)
(voltage between pins of
C515 and C516) :
DC0V (when stopped)
DC1–6.5V (when operated)
(Same as CNF1,2 6(+)–4(-))
CNF1, 2
Connect to fan motors
1–4 : DC290V–350V
5–4 : DC15V
6–4 : DC0–6.5V
7–4 : DC15V (when stopped)
DC0–15V pulse
(when operated)
VDC (TEST POINT1)
(Voltage between pins of
C510) : DC290V–350V
(Same as CNF1,2 1(+)–4(-))
VFG (TEST POINT4)
(voltage between left pins of
PC511 and PC512, pin1 and
pin2) :
(Same as CNF1,2 7(+)–4(-))
TH4 Thermistor
<Discharge/Compressor>
TH7/ 6 Thermistor
<Outdoor/ Saturation tem-
perature of suction pressure>
63HS
High presser sensor
63H
High presser switch
TH3 Thermistor
<Outdoor pipe>
CN3D
Input of demand control
63L
Low pressure switch
SW1
Display selection
(Self diagnosis)
SWU2, SWU1
Address setting
SW8
Demand/ Silent selection
52C
52C relay signal
CNLVB
(only P36/P48NHMU2)
Connect to the oudoor noise
filter circuit board(CN52C)
1–6 : DC12V
CNDC and C510 have the same voltage.
Also possible to check at self check No. 45
SW1 : 10110100